Area Forecast Discussion
Issued by NWS Charleston, WV

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625 FXUS61 KRLX 180043 AFDRLX Area Forecast Discussion National Weather Service Charleston WV 841 PM EDT Thu Aug 17 2017 .SYNOPSIS... Cold front tonight into Friday. High pressure builds for dry weather through Tuesday. Another cold front by mid week. && .NEAR TERM /UNTIL MIDNIGHT TONIGHT/...
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As of 840 PM Thursday... Updated the forecast to better handle the showers/thunderstorms moving across northern WV this evening. As of 540 PM Thursday... Line of thunderstorms is moving into western portions of the area faster than models indicated. Have updated the forcast for early this evening to reflect this faster timing. As of 225 PM Thursday... QLCS across Eastern Ohio associated with a prefrontal trough will push into the Ohio Valley later this evening. Well out ahead of this line we are currently seeing isolated to scattered showers and storms across our area. Despite moist and unstable low level profiles, drier air in the mid level has kept these cells in check, and the severe threat with these cells is extremely low, however they do contain brief downpours. Any severe storm threat will be associated with the main convective line later this evening, but this threat is still quite low, with our Northern Ohio Counties most at risk. Here, 0-6km bulk shear will be strongest at about 30 to 35 knots and although instability will drops off by the time it arrives later this evening, there may still be enough there to produce borderline severe storms. Also, with the high PWATs, torrential rainfall will be possible into the overnight hours. The actual cold front will not pass the area until later tomorrow afternoon and some weak showers and storms are possible. Behind the front drier air moves in with high pressure.
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&& .SHORT TERM /MIDNIGHT TONIGHT THROUGH SUNDAY/... As of 300 PM Thursday... A cold front will continue its track east of the mountains Friday night. Some chances for showers or isolated storms could remain shortly behind the front so kept Chance Pop across WV except likely over elevations higher than 3000 feet. The cold front will be located far southwest of the area allowing for dry conditions Saturday through and Monday. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... As of 300 PM Thursday... High pressure continues Monday through Wednesday night producing widespread clear and dry weather. However, moisture will increase Tuesday and Wednesday ahead of the next approaching cold front. The cold front brings better chances for showers and thunderstorms as it crosses Wednesday into Thursday. && .AVIATION /01Z FRIDAY THROUGH TUESDAY/...
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As of 540 PM Thursday... Bands of showers and thunderstorms will move across the region overnight into Friday. A cold front will then push through on Friday, with precipitation ending behind the front. Brief IFR will be possible with the showers and thunderstorms, and along the cold front. Conditions will become VFR behind the cold front on Friday. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 00Z SATURDAY... FORECAST CONFIDENCE: Medium. ALTERNATE SCENARIOS: Timing of showers and thunderstorms could vary. Some fog can not be ruled out in the mountain valleys overnight. EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY OF WFO FORECAST TO AVAILABLE MODEL INFORMATION: H = HIGH: TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS. L = LOW: TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. DATE FRI 08/18/17 UTC 1HRLY 00 01 02 03 04 05 06 07 08 09 10 11 EDT 1HRLY 20 21 22 23 00 01 02 03 04 05 06 07 CRW CONSISTENCY H H H H H H H H H H M M HTS CONSISTENCY H H H H H H H H H H H M BKW CONSISTENCY H H H H H H H H H H H L EKN CONSISTENCY H H H H H H M M M M M L PKB CONSISTENCY H H H H M H M M H H M L CKB CONSISTENCY H H H H H H L L L L M M AFTER 00Z SATURDAY... Dense river valley fog possible each morning.
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&& .RLX WATCHES/WARNINGS/ADVISORIES... WV...None. OH...None. KY...None. VA...None. && $$ SYNOPSIS...ARJ/MPK NEAR TERM...RPY/MPK SHORT TERM...ARJ LONG TERM...ARJ AVIATION...MPK

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